G.f. A(x) satisfies 1 + 5*A(x) = Sum_{n>=0} (x + 4*A(x)^n)^n.
A380064
G.f. A(x) satisfies 1 + 5*A(x) = Sum_{n>=0} (x + 4*A(x)^n)^n.
Terms
- a(0) =1a(1) =1a(2) =9a(3) =33a(4) =229a(5) =1381a(6) =9169a(7) =63225a(8) =440257a(9) =3164657a(10) =22959933a(11) =169226413a(12) =1259998401a(13) =9468455953a(14) =71735232745a(15) =547149712977
External references
- oeis: A380064